Quick-acting valve with rocker-type operating button

ABSTRACT

A spring, preferably additionally connected to a ball, is interposed in the motion transfer mechanism from a rocker-type operating button to the valve element of a quick-acting valve, the spring compensating for overtravel during operation and for manufacturing tolerances, to effect tight seating of the valve element while permitting rapid operation of the valve element.

United States Patent Braas 51 Mar. 7, 1972 [54] QUICK-ACTING VALVE WITHROCKER-TYPE OPERATING BUTTON Inventor: Alfred Braas, Dillenburg, GermanyArmaturenwerk Niederscheld Gmbll, Dillenburg/Hessen, Germany Sept. 22,1969 Assignee:

Filed:

Appl. No.:

References Cited UNITED STATES PATENTS l/1965 Noakes et al. ..251/77 X3,166,500 1,264,282 4/1918 Dearing 2,496,638 2/1950 Ray i n/553x U: v.I0

3,389,886 6/1968 Tissot-Dupont ..251/77'X 2,942,622 6/1960 Hahn et a1..25 l/263 X 1,988,956 l/1935 Newell 251/75 1,990,747 2/1935 Netschert.....25l/75 X 2,055,133 9/1936 Newell ..25l/75 X FOREIGN PATENTS ORAPPLICATIONS 1,280,281 11/1961 France ..25 l /77 Primary Examiner-HenryT. Klinksiek Attorney-Flynn & Frishauf [57] ABSTRACT A spring,preferably additionally connected to a ball, is interposed in the motiontransfer mechanism from a rocker-type operating button to the valveelement of a quick-acting valve, the spring compensating forovertravelduring operation and for manufacturing tolerances, to effecttight seating of the valve element while permitting rapid operation ofthe valve element.

3 Claims, 4 Drawing Figures has direct action on the valve disk througha cam and the'intermediary member. The differences existing between thedimensions of the component parts due to manufacturing tolerances mayresult in poor cooperation between the tilting operating button and thevalve disk. The manufacturing tolerances of the power transmissionconsisting of rigid intermediary members may also, during the closingoperation give rise to a canting of the valve diskon the valve seat,thus sub stantially reducing the blocking effect of the valve.

SUBJECT MATTER OF THE PRESENT INVENTION A flexible element is providedfor the trip cam to act upon a spring-loaded valve body. Preferably, aball is positioned between the trip cam and the thrustpiece said ballcausingan even transmission of power between the two component parts.The trip cam now only acts indirectly on the valve disk through theball, the resilient element, (formed, for example by a cup spring) and amember. Canting of the valve disk is avoided. One or more cup springsmay be provided, the springs pressing the valve disk against the valveseat with even pressure. They can absorb any excess lift upon theclosing of the valve while compensating for manufacturing tolerances aswell. Preferably the operating button is formed with a window throughwhich a position indicator is visible showing the position of the valve,i.e., whether open or closed.

Referring to the accompanying drawings:

FIG. I is a longitudinal section of a quick-acting valve in closedposition;

FIG. 2 is a plan view of the valve, the window, and the positionindicator in closed position;

FIG. 3 is a longitudinal section of the quick-acting valve in openposition;

FIG. 4 is a plan view of the quick-acting valve, the window, and theposition indicator in open position.

Fluid flows through valve body of the quick-acting valve in thedirection indicated by the arrows. Valve body 10 is provided with avertical bore 12 enclosing a valve disk 16 and provide a guide bore forvalve disk 16 and valve disk guide stem 14. A cup spring-receivingmember 18 abuts the valve disk 16. One or more elastic members in theform of cup springs 20 are disposed in the recess on the upper face ofdisk spring-receiving member 18. In closed position of the quickactingvalve the elastic cup springs 20 cause the valve disk 16 to evenly abutvalve seat 46 (FIGS. 1 and 3). A thrustpiece 26 is seated with itsbottom surface on the cup springs 20, which bear against receivingmember 18. Thrustpiece 26 is formed with a concentric recess into whichvalve disk guide 14 fits with axial and radial clearance.

The deformable cup springs 20 balance clearances between thrustpiece 26and valve disk guide 14.

I A spring 44 coaxially encloses valve spring guide 14 and is supportedby the bottom surface of a valve chamber 50 and by a stop member of thevalve spring guide 14. In the open position spring 44 lifts valve disk16 from valve seat 46 (see FIG. 3). The upper part of valve chamber 50which is set off against its lower part has a larger diameter than thelower part.

A closing member 22 limits valve chamber 50 upwardly, containingthrustpiece 26 and ball 24 in a concentric bore. A disk 30 and a O-ring32 seal valve chamber 50 off against closing member 22. A second O-rin34 disposed in the concentric guide of closing member 22 sea 5 plece 26.Closing part 22 is coupled with valve body 10 through a nut 28.

When a rocker-type operating button 42 is in its closed position, a tripcam 38 causes ball 24, which moves thrustpiece 26 downwardly against thepressure of spring 44, to move in a downward direction, while valve disk16 closes valve seat 46. Rocker-type operating button 42, trip cam 38and a position indicator 40 are tiltably arranged on a bearing pin 36.Trip cam 38 is formed with an overcenter projection, to hold it ineither on or ofi position.

A window 48 provided in the rocker-type operating button 42 permits theposition of the indicator 40 to be visually indicated.

In the open-position, spring-44 urges ball 24 into a recess of trip cam38 thus liftingvalve disk 16 connected with valve disk guide 14 fromvalve seat 46.

I claim:

1. Quick-acting two-position valve having a rocker-type snap-actionoperating button whose one position determines the open condition andwhose other position determines the closed condition of the valve,comprising a valve housing (10);

a valve seat (46) in the housing;

a valve body (16) movable in the housing;

a guide pin (14) guiding movement of the valve body (16) in the housingbetween positions where the valve body is lifted ofi the valve seat andwhere the valve body contacts the valve seat;

a cam (38) formed with an overcenter position secured to the operatingbutton, the operating button being secured to the valve housing forrocking motion, with the cam facing in the direction of the valve body(16);

a motion transfer means interconnecting the cam (38) of the'operatingbutton and said valve body including a diskshaped element (18) acting onthe valve body (16), a ball (24) in engagement with the cam, and acylindrical thrust transfer element (26) in engagement with the ball;and at least one cup spring (20) bearing on the disk-shaped element (18)with one side thereof, surrounding the guide pin, and located to beinterposed between the cylindrical thrust transfer element to providefor transfer of motion from the cam, upon rocking of the operatingbutton, to the valve body and permitting travel of the cam past theovercenter position and snap action of the operating button, theoperating button being formed with a window (48); and

a position indicator (40) stationary in the housing, is located in thehousing to be visible through the window.

2. Valve according to claim I, wherein the cylindrical thrust element(26) is fonned with a central bore of larger diameter than the diameterof the valve body guide pin (14) and the valve body guide pin extendsinto the bore with radial and axial clearance.

3. Valve according to claim 1, wherein the motion transfer means furtherincludes a ball (24) and a cylindrical thrust transfer element (26), oneend surface of the thrust transfer element bearing against at least onecup spring (20), the ball being arranged between the cam (38) and theother end surface of the thrust transfer element.

1. Quick-acting two-position valve having a rocker-type snapactionoperating button whose one position determines the open condition andwhose other position determines the closed condition of the valve,comprising a valve housing (10); a valve seat (46) in the housing; avalve body (16) movable in the housing; a guide pin (14) guidingmovement of the valve body (16) in the housing between positions wherethe valve body is lifted off the valve seat and where the valve bodycontacts the valve seat; a cam (38) formed with an overcenter positionsecured to the operating button, the operating button being secured tothe valve housing for rocking motion, with the cam facing in thedirection of the valve body (16); a motion transfer meansinterconnecting the cam (38) of the operating button and said valve bodyincluding a disk-shaped element (18) acting on the valve body (16), aball (24) in engagement with the cam, and a cylindrical thrust transferelement (26) in engagement with the ball; and at least one cup spring(20) bearing on the disk-shaped element (18) with one side thereof,surrounding the guide pin, and located to be interposed between thecylindrical thrust transfer element to provide for transfer of motionfrom the cam, upon rocking of the operating button, to the valve bodyand permitting travel of the cam past the overcenter position andsnap-action of the operating button, the operating button being formedwith a window (48); and a position indicator (40) stationary in thehousing, is located in the housing to be visible through the window. 2.Valve according to claim 1, wherein the cylindrical thrust element (26)is formed with a central bore of larger diameter than the diameter ofthe valve body guide pin (14) and the valve body guide pin extends intothe bore with radial and axial clearance.
 3. Valve according to claim 1,wherein the motion transfer means further includes a ball (24) and acylindrical thrust transfer element (26), one end surface oF the thrusttransfer element bearing against at least one cup spring (20), the ballbeing arranged between the cam (38) and the other end surface of thethrust transfer element.